JP7324555B1 - Manufacturing method of syringe and integrated plunger - Google Patents

Manufacturing method of syringe and integrated plunger Download PDF

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JP7324555B1
JP7324555B1 JP2023091469A JP2023091469A JP7324555B1 JP 7324555 B1 JP7324555 B1 JP 7324555B1 JP 2023091469 A JP2023091469 A JP 2023091469A JP 2023091469 A JP2023091469 A JP 2023091469A JP 7324555 B1 JP7324555 B1 JP 7324555B1
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syringe
shaft
pusher
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tip
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秀剛 中村
聡 中道
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atDose Co., Ltd.
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Abstract

【課題】作業効率を高めると共に被注射者の負担を軽減する注射器を提供すること。【解決手段】筒状のシリンジ部１０と、シリンジ部に組み込まれる一体押子２０と、を有する注射器１００。一体押子は、シリンジ部の内部に配置される軸部３０と、シリンジ部の外部に配置される操作部５０と、軸部と操作部とをつなぐ連結部とが一体成形されたものである。シリンジ部は、連結部をシリンジ部の延伸方向に案内する切欠き状のガイド部１５を有する。軸部は棒状であり、操作部は平面視で延伸方向を長辺とする長方形状である。連結部は、軸部の後部と操作部の後部とに接続されている。ユーザは、シリンジ部側部の操作部を指先等でスライドさせることにより、軸部を延伸方向に移動させることができる。よって、注射に係る一連の作業の時間短縮と簡略化が実現され、液体等の吸引作業及び吐出作業の効率が高まり、吸引時又は吐出時の針先のぶれが抑制される。【選択図】図７An object of the present invention is to provide a syringe that increases work efficiency and reduces the burden on the person being injected. A syringe (100) having a cylindrical syringe portion (10) and an integral plunger (20) incorporated in the syringe portion. The integral pusher is formed by integrally molding a shaft portion 30 arranged inside the syringe portion, an operation portion 50 arranged outside the syringe portion, and a connecting portion connecting the shaft portion and the operation portion. . The syringe portion has a notch-shaped guide portion 15 that guides the connecting portion in the extending direction of the syringe portion. The shaft portion has a rod shape, and the operation portion has a rectangular shape with a long side extending in the extending direction in a plan view. The connecting portion is connected to the rear portion of the shaft portion and the rear portion of the operating portion. The user can move the shaft portion in the extending direction by sliding the operation portion on the side of the syringe portion with a fingertip or the like. As a result, a series of operations related to injection can be shortened and simplified, the efficiency of liquid aspiration and ejection operations can be enhanced, and needle tip deflection during aspiration or ejection can be suppressed. [Selection drawing] Fig. 7

Description

本発明は、液体や気体を吸引又は吐出するために用いられる注射器及びこれに備わる一体押子の製造方法に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe used for sucking or discharging liquid or gas, and a manufacturing method for an integrated plunger provided therein.

医療等の現場では注射器が頻繁に使用されている。一般に注射器は、薬液を体内に注入したり、体液や血液等を体内から吸引するために用いられる（例えば特許文献１参照）。特許文献１のような従来の注射器は、シリンジに挿入されたプランジャを前後に動かすことで、プランジャの先端に固定されたガスケットを移動させ、液体の吸引又は吐出を行うよう構成されている。 Syringes are frequently used in the medical field. Syringes are generally used to inject drug solutions into the body and to aspirate body fluids, blood, and the like from the body (see Patent Document 1, for example). A conventional syringe such as that disclosed in Patent Document 1 is configured to move a gasket fixed to the tip of the plunger by moving the plunger inserted into the syringe back and forth, thereby sucking or discharging liquid.

特開２０１８－１５８１７９号公報JP 2018-158179 A

しかしながら、従来の注射器を人体又は動物に用いる場合、ユーザは、エア抜き後にシリンジの先端側を持って血管や筋肉等に針を刺し、その後プランジャ側に持ち替えた上で液体の吸引又は吐出を行う必要がある。このように、従来の注射器を用いる場合、ユーザは、エア抜きから薬液の注入までの間、又は体液採取や採血等の場面において、シリンジの先端側と後端側との持ち替えが必要となるため、注射に係る一連の作業が煩雑となり、作業時間も長くなる。また、対象に針を刺した状態の注射器をユーザが持ち替える際、針先がぶれる恐れもあり、皮膚細胞組織の損傷や患者等の被注射者の痛みにも繋がり得る。 However, when a conventional syringe is used for a human body or an animal, the user holds the tip side of the syringe and sticks the needle into a blood vessel, muscle, or the like after removing the air, and then shifts the hand to the plunger side and aspirates or discharges the liquid. There is a need. As described above, when using a conventional syringe, the user needs to switch between the front end and the rear end of the syringe during the period from bleeding air to injecting the liquid medicine, or when collecting body fluid or blood. , the series of operations related to the injection becomes complicated, and the operation time becomes long. In addition, when the user changes hands of the syringe with the needle sticking to the target, the tip of the needle may be shaken, which may lead to damage to skin cells and pain to the recipient such as the patient.

本発明は、上述のような課題を解決するためになされたものであり、作業効率を高めると共に被注射者の負担を軽減する注射器及びその製造方法を提供することを目的とする。 The present invention has been made to solve the problems described above, and an object of the present invention is to provide a syringe and a method of manufacturing the same that improve work efficiency and reduce the burden on the person being injected.

本発明の一態様に係る注射器は、筒状のシリンジ部と、シリンジ部と組み合わせて用いられる一体押子と、を有し、一体押子は、シリンジ部の内部に配置される棒状の軸部と、シリンジ部の外部に配置される操作部と、軸部と操作部とをつなぐ連結部とが一体成形されたものであり、シリンジ部は、連結部をシリンジ部の延伸方向に案内する切欠き状のガイド部を有し、操作部は、平面視で延伸方向を長辺とする長方形状であり、連結部は、軸部及び操作部それぞれの、シリンジ部におけるガイド部側の部分に接続されている。 A syringe according to an aspect of the present invention has a cylindrical syringe portion and an integral pusher used in combination with the syringe portion, and the integral pusher is a rod-shaped shaft portion arranged inside the syringe portion. and an operating portion arranged outside the syringe portion, and a connecting portion connecting the shaft portion and the operating portion are integrally molded. It has a notch-shaped guide part, the operation part has a rectangular shape with a long side in the extending direction in plan view, and the connection part is connected to the part of the syringe part on the guide part side of each of the shaft part and the operation part It is

本発明の一態様に係る上記一体押子の製造方法は、該一体押子を平面視での延伸方向に沿った断面で対称に分けたときの、一方の部材に対応する第１金型と、他方の部材に対応する第２金型とを合わせて閉じる型締め工程と、第１金型と第２金型とにより形成される空洞に、加熱され溶融された樹脂を注入する樹脂注入工程と、第１金型と第２金型とを分離する型開き工程と、を有する。 A method for manufacturing the above-described integrated presser according to an aspect of the present invention includes a first mold corresponding to one member when the integrated presser is divided symmetrically in a cross section along the extending direction in a plan view, and , a mold clamping step of closing the second mold corresponding to the other member, and a resin injection step of injecting heated and melted resin into the cavity formed by the first mold and the second mold. and a mold opening step of separating the first mold and the second mold.

本発明は、軸部と連結部と操作部とからなる一体押子を有すると共に、一体押子の連結部を延伸方向に案内する切欠き状のガイド部をもつシリンジ部を有している。よって、ユーザは、操作部を指先等でスライドさせることにより、軸部を延伸方向に移動させ、液体の吸引又は吐出を行うことができる。したがって、注射に係る作業の効率を高めると共に被注射者の負担を軽減することができる。 The present invention has an integral pusher composed of a shaft portion, a connecting portion, and an operating portion, and has a syringe portion having a notched guide portion for guiding the connecting portion of the integral pusher in the extending direction. Therefore, the user can move the shaft portion in the extending direction by sliding the operation portion with a fingertip or the like, thereby sucking or discharging the liquid. Therefore, it is possible to improve the efficiency of the work related to the injection and reduce the burden on the injection recipient.

本発明の実施の形態に係る注射器の全体的な構成例を示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the whole structural example of the syringe which concerns on embodiment of this invention. 図１の注射器の各構成部材を例示した分解側面図である。FIG. 2 is an exploded side view illustrating each component of the syringe of FIG. 1; 図１のシリンジ部を示す平面図である。FIG. 2 is a plan view showing the syringe portion of FIG. 1; 図１の注射器を示す平面図である。Figure 2 is a plan view of the syringe of Figure 1; 図１の注射器において、シリンジ部の後端部に一体押子の連結部を挿入した状態例を示す説明図である。FIG. 2 is an explanatory diagram showing an example of a state in which the connecting portion of the integral pusher is inserted into the rear end portion of the syringe portion in the syringe of FIG. 1; 図１の注射器につき、図５の状態から一体押子をガイド部に沿って前方に移動させた状態例を示す説明図である。FIG. 6 is an explanatory view showing an example of a state in which the integral pusher is moved forward along the guide portion from the state of FIG. 5 for the syringe of FIG. 1; 図４のＡ－Ａ線に沿った概略断面図である。FIG. 5 is a schematic cross-sectional view along line AA of FIG. 4; 図１の注射器の押出状態に対応する図７と同様の概略断面図である。Figure 8 is a schematic cross-sectional view similar to Figure 7 corresponding to the pushed state of the syringe of Figure 1; 図１の一体押子を製造するための一対の金型を例示した説明図である。FIG. 2 is an explanatory diagram illustrating a pair of molds for manufacturing the integral pusher of FIG. 1; 図１の一体押子の製造方法の各工程を例示したフローチャートである。FIG. 2 is a flow chart illustrating each step of a manufacturing method of the integral pusher of FIG. 1; FIG. 本発明の実施の形態２に係る注射器の一体押子を例示した側面図である。FIG. 10 is a side view illustrating an integral plunger of a syringe according to Embodiment 2 of the present invention;

実施の形態１．
図１～図１０を参照し、実施の形態１における注射器１００の構成例について説明する。以降の各図では説明の便宜上、ｘ軸方向を前後方向、ｙ軸方向を左右方向、ｚ軸方向を上下方向と定義する。各方向は、注射器１００における各構成部材の向きや位置関係を示すために用いる。各図では煩雑さを避けるため、符号の一部を適宜省略する。 Embodiment 1.
A configuration example of a syringe 100 according to Embodiment 1 will be described with reference to FIGS. 1 to 10. FIG. In the following figures, for convenience of explanation, the x-axis direction is defined as the front-back direction, the y-axis direction is defined as the left-right direction, and the z-axis direction is defined as the up-down direction. Each direction is used to indicate the orientation and positional relationship of each component in syringe 100 . In order to avoid complication in each drawing, some of the reference numerals are omitted as appropriate.

まず、図１～図４に基づき、注射器１００の全体的な構成例について説明する。図１に示すように、注射器１００は、筒状のシリンジ部１０と、シリンジ部１０と組み合わせて用いられる一体押子２０と、ガスケット８０と、を有している。シリンジ部１０及び一体押子２０はそれぞれ、樹脂等により形成される。 First, based on FIGS. 1 to 4, an overall configuration example of the syringe 100 will be described. As shown in FIG. 1 , the syringe 100 has a tubular syringe portion 10 , an integral plunger 20 used in combination with the syringe portion 10 , and a gasket 80 . The syringe part 10 and the integrated plunger 20 are each made of resin or the like.

シリンジ部１０は、筒本体１１と筒先部１４とを有している。筒本体１１は、一端に筒先部１４が接続され、筒状に延伸する外筒部１２と、外筒部１２の他端に接続された板状のエッジ部１３と、を有している。筒本体１１は、外筒部１２からエッジ部１３に亘って形成された断面視円形状の軸穴１ｈを有している。軸穴１ｈの内径は、注射器１００の用途等に合わせて設定される。軸穴１ｈは、一体押子２０の軸部３０の挿入用の穴である。軸穴１ｈのうち、エッジ部１３で囲われた部分のことを出入穴３ｈという。各図に例示する外筒部１２は、筒状に形成された側壁部１２ａと、環状に形成された先端部１２ｂと、を有している。側壁部１２ａは、シリンジ部１０に装着した一体押子２０により挟まれる部分である壁頂部１２ｔを有している（図２及び図３参照）。 The syringe portion 10 has a barrel main body 11 and a barrel tip portion 14 . The tube main body 11 has an outer tube portion 12 having one end connected to the tube tip portion 14 and extending in a tubular shape, and a plate-like edge portion 13 connected to the other end of the outer tube portion 12 . The cylinder main body 11 has a circular shaft hole 1h in cross section formed from the outer cylinder portion 12 to the edge portion 13 . The inner diameter of the shaft hole 1h is set according to the use of the syringe 100 and the like. The shaft hole 1h is a hole for inserting the shaft portion 30 of the integrated presser 20. As shown in FIG. A portion of the shaft hole 1h surrounded by the edge portion 13 is referred to as an inlet/outlet hole 3h. The outer tube portion 12 illustrated in each figure has a cylindrically formed side wall portion 12a and an annularly formed tip portion 12b. The side wall portion 12a has a wall top portion 12t which is a portion sandwiched by the integrated pusher 20 attached to the syringe portion 10 (see FIGS. 2 and 3).

筒先部１４は、注射針等（図示せず）が装着される部分である。各図では、ルアーチップ式の筒先部１４を例示しているが、これに限らず、筒先部１４は、ルアーロック式やルアーメタル式など種々の形式を採ることができる。エッジ部１３は、外筒部１２の後端部の強度を補うと共に、持ちやすさを高めるために機能する。エッジ部１３は、ガイド部１５の箇所が欠けた環状に形成されている。エッジ部１３の厚みＥは、例えば側壁部１２ａの厚みＴよりも厚く設定され、操作に適した強度が得られる範囲で適宜変更可能である。シリンジ部１０は、ユーザが内部の薬液等を視認できるよう、透明性を持つ樹脂により形成するとよい。 The tip portion 14 is a portion to which an injection needle or the like (not shown) is attached. In each figure, a luer tip type tube tip 14 is illustrated, but the tube tip 14 is not limited to this, and various types such as a luer lock type and a luer metal type can be adopted. The edge portion 13 functions to reinforce the strength of the rear end portion of the outer cylinder portion 12 and to enhance the ease of holding. The edge portion 13 is formed in an annular shape with the portion of the guide portion 15 missing. The thickness E of the edge portion 13 is set, for example, to be thicker than the thickness T of the side wall portion 12a, and can be appropriately changed within a range in which strength suitable for operation can be obtained. The syringe part 10 is preferably made of transparent resin so that the user can see the liquid medicine inside.

図２に示すように、一体押子２０は、シリンジ部１０の内部に配置される棒状の軸部３０と、シリンジ部１０の外部に配置される操作部５０と、軸部３０と操作部５０とをつなぐ連結部４０とが一体成形されたものである。すなわち、一体押子２０は、軸部３０と連結部４０と操作部５０とにより側面視Ｕ字状に形成されている。なお図１では、シリンジ部１０の内部に配置される軸部３０及びガスケット８０を破線で示している。 As shown in FIG. 2, the integrated pusher 20 includes a rod-shaped shaft portion 30 arranged inside the syringe portion 10, an operation portion 50 arranged outside the syringe portion 10, and a shaft portion 30 and the operation portion 50. A connecting portion 40 connecting the two is integrally molded. That is, the integrated pusher 20 is formed in a U shape in a side view by the shaft portion 30, the connecting portion 40, and the operating portion 50. As shown in FIG. In FIG. 1, the shaft portion 30 and the gasket 80 arranged inside the syringe portion 10 are indicated by broken lines.

軸部３０は、ガスケット８０が連結されるもので、軸本体３１と先端突起３２とを有している。軸本体３１は、棒状に形成され、後部に連結部４０が接続されている。先端突起３２は、軸本体３１の前端面から延びており、ガスケット８０の後端に設けられた連結溝（不図示）に嵌め込まれる。図２では、ガスケット８０の先端から連結部４０の先端までの長さＱを示すため、先端突起３２に取り付けられたガスケット８０を破線で例示している。軸部３０の延伸方向の長さは、要求される可動域及び連結部４０の延伸方向の長さＰ等に応じて設定される。 The shaft portion 30 , to which the gasket 80 is connected, has a shaft body 31 and a tip projection 32 . The shaft main body 31 is formed in a rod shape, and the connecting portion 40 is connected to the rear portion thereof. The tip protrusion 32 extends from the front end surface of the shaft body 31 and is fitted into a connecting groove (not shown) provided at the rear end of the gasket 80 . In FIG. 2, in order to indicate the length Q from the tip of the gasket 80 to the tip of the connecting portion 40, the gasket 80 attached to the tip protrusion 32 is illustrated with a dashed line. The length of the shaft portion 30 in the extending direction is set according to the required range of motion, the length P of the connecting portion 40 in the extending direction, and the like.

ガスケット８０は、シリンジ部１０の内部に配置されるもので、ゴムなどの弾性材料により形成される。ガスケット８０は、外筒部１２の内面に密着するよう、円柱状に形成されている。ガスケット８０の先端形状は、外筒部１２の内部先端の形状に合わせられる。各図に例示するガスケット８０は、前後の端部の径が、中央の端部の径よりも大きくなっている。軸本体３１の外径は、ガスケット８０の外径よりも幾分か短くなっている。ここで、ガスケット８０の外径とは、ガスケット８０のうちで最も太い部分の外径を指す。よって、ガスケット８０を取り付けた一体押子２０をシリンジ部１０に組み込むと、ガスケット８０の端部等の側面がシリンジ部１０の内面に密着する。 The gasket 80 is arranged inside the syringe portion 10 and is made of an elastic material such as rubber. The gasket 80 is formed in a cylindrical shape so as to be in close contact with the inner surface of the outer cylindrical portion 12 . The shape of the tip of the gasket 80 is adapted to the shape of the inner tip of the outer cylindrical portion 12 . The gasket 80 illustrated in each figure has a larger diameter at the front and rear ends than at the center end. The outer diameter of the shaft body 31 is somewhat shorter than the outer diameter of the gasket 80 . Here, the outer diameter of the gasket 80 refers to the outer diameter of the thickest portion of the gasket 80 . Therefore, when the integrated plunger 20 with the gasket 80 attached is incorporated into the syringe portion 10 , the side surfaces such as the end portions of the gasket 80 are in close contact with the inner surface of the syringe portion 10 .

操作部５０は、シリンジ部１０の側面に対向配置される。本実施の形態１の操作部５０は、平面視において、延伸方向を長辺とする長方形状となっている。操作部５０は、断面視矩形状だけでなく、断面視円形状及び断面視楕円形状等の他、両サイドに多少の湾曲が施されていても、平面視で長方形状に視認される。各図の操作部５０は、断面視において概ね矩形状で、各角が丸みを帯びており、先端はやや先細りとなっている。操作部５０において、シリンジ部１０と対向するよう配置される面を裏面５ｆとし、裏面５ｆとは反対側の面を操作面５ｇとする。操作部５０の裏面５ｆは平坦となっている。操作部５０は、裏面５ｆにおける後方に連結部４０が接続されている。 The operation part 50 is arranged to face the side surface of the syringe part 10 . The operation unit 50 of Embodiment 1 has a rectangular shape with long sides extending in the extending direction in a plan view. The operation unit 50 has not only a rectangular cross-sectional shape, but also a circular cross-sectional shape, an elliptical cross-sectional shape, and the like. The operation unit 50 in each figure has a substantially rectangular shape in a cross-sectional view, with rounded corners and a slightly tapered tip. In the operation portion 50, the surface arranged to face the syringe portion 10 is referred to as a back surface 5f, and the surface opposite to the back surface 5f is referred to as an operation surface 5g. A rear surface 5f of the operation unit 50 is flat. The connecting portion 40 is connected to the rear side of the back surface 5f of the operating portion 50 .

各図に例示する操作部５０は、前方に配置された主部５１と、後方に配置された支持部５２と、を有している。連結部４０は支持部５２に接続されている。主部５１は、支持部５２から延伸方向に沿って延びている。主部５１は、指での操作用に、延伸方向における中央に向けて徐々に高さが低くなっている。ここでの高さとは、上下方向の長さのことである。よって、主部５１は、側面視で中央に向けて凹んだ形状となっている。支持部５２は、操作の妨げとならないよう、主部５１から後端に向けて上下方向の高さが徐々に低くなっている。もっとも、支持部５２の形状は、各図の例に限定されない。 The operation portion 50 illustrated in each figure has a main portion 51 arranged in front and a support portion 52 arranged in rear. The connecting portion 40 is connected to the support portion 52 . The main portion 51 extends from the support portion 52 along the extending direction. The main portion 51 gradually decreases in height toward the center in the extending direction for finger operation. The height here means the length in the vertical direction. Therefore, the main portion 51 has a shape recessed toward the center when viewed from the side. The height of the support portion 52 in the vertical direction gradually decreases from the main portion 51 toward the rear end so as not to interfere with the operation. However, the shape of the support portion 52 is not limited to the examples in each figure.

操作部５０は、操作性を高めるための１又は複数の凸部５１ｐが操作面５ｇに設けられている。凸部５１ｐの数及び配置は、各図の例に限らず、適宜変更可能である。もっとも、操作部５０の操作面５ｇは、凸部５１ｐの代わりに又は凸部５１ｐと共に、ユーザの操作性を高める滑り止めが施されていてもよい。各図では、操作面５ｇが側面視で湾曲した形状の主部５１を例示しているが、これに限定されない。例えば主部５１は、操作面５ｇが側面視でＶ字状のものであってよい。主部５１の操作面５ｇは、平坦に形成してもよいが、操作性向上の観点から、各図のように中央に向けて凹んだ形状の方が好ましい。 The operating portion 50 has one or a plurality of convex portions 51p provided on the operating surface 5g for enhancing operability. The number and arrangement of the protrusions 51p are not limited to the examples in each figure, and can be changed as appropriate. However, the operation surface 5g of the operation unit 50 may be provided with a non-slip surface to improve the user's operability instead of or together with the projections 51p. Each figure illustrates the main portion 51 having a shape in which the operation surface 5g is curved when viewed from the side, but the present invention is not limited to this. For example, the main portion 51 may have a V-shaped operation surface 5g when viewed from the side. The operation surface 5g of the main portion 51 may be formed flat, but from the viewpoint of improving operability, it is preferable that the operation surface 5g is recessed toward the center as shown in each figure.

連結部４０は、軸部３０のガスケット８０とは反対側の部分、つまり軸部３０の後部に接続されている。軸部３０のガスケット８０とは反対側は、シリンジ部１０におけるガイド部１５側（シリンジ部１０における一体押子２０の挿入側）、つまりｘ軸負側と等しい。また、連結部４０は、操作部５０の、シリンジ部１０におけるガイド部１５側の部分、つまり操作部５０の後部に接続されている。各図の連結部４０は、直方体状に形成され、軸部３０の側面における後方と、操作部５０の裏面５ｆにおける後方とに接続されている。本実施の形態１の一体押子２０は、軸部３０と連結部４０と操作部５０との延伸方向における後端の位置が揃っている。各図に例示する一体押子２０は、軸部３０の後端面と連結部４０の後端面と操作部５０の後端面とが面一となっている。もっとも、一体押子２０は、連結部４０の後端面が軸部３０及び操作部５０の後端面よりも内側に位置する構造など、各部材の後端面が揃っていなくてもよい。連結部４０は、外側に湾曲したＲ形状の前端面４ａを有している。もっとも、前端面４ａは平坦なものであってよい。 The connecting portion 40 is connected to the portion of the shaft portion 30 opposite to the gasket 80 , that is, to the rear portion of the shaft portion 30 . The side of the shaft portion 30 opposite to the gasket 80 is the side of the guide portion 15 of the syringe portion 10 (the side of the syringe portion 10 on which the integrated pusher 20 is inserted), that is, the x-axis negative side. Further, the connecting portion 40 is connected to the portion of the operation portion 50 on the side of the guide portion 15 in the syringe portion 10 , that is, the rear portion of the operation portion 50 . The connecting portion 40 in each figure is formed in a rectangular parallelepiped shape and is connected to the rear of the side surface of the shaft portion 30 and the rear of the back surface 5f of the operating portion 50 . In the integrated pusher 20 of Embodiment 1, the rear ends of the shaft portion 30, the connecting portion 40, and the operating portion 50 are aligned in the extending direction. In the integrated pusher 20 illustrated in each figure, the rear end surface of the shaft portion 30, the rear end surface of the connecting portion 40, and the rear end surface of the operating portion 50 are flush with each other. However, the integral pusher 20 may have a structure in which the rear end surface of the connecting portion 40 is located inside the rear end surfaces of the shaft portion 30 and the operation portion 50, or the rear end surfaces of the respective members may not be aligned. The connecting portion 40 has an outwardly curved R-shaped front end surface 4a. However, the front end surface 4a may be flat.

図１～図４に示すように、シリンジ部１０は、連結部４０を延伸方向に案内する切欠き状のガイド部１５を有している。シリンジ部１０において、壁頂部１２ｔとガイド部１５とは、延伸方向に沿って並んでいる。なお図４では、実際には視認できない連結部４０を破線で示している。ガイド部１５は、平面視長方形状に形成されたスリット状の開口であり、シリンジ部１０の後部から連結部４０を挿入できるよう後端が開放されている。ガイド部１５の各側面１５ｓは、延伸方向に平行となっている。ガイド部１５は、連結部４０を延伸方向に沿って安定的に移動させるものである。以降、ガイド部１５の後端、つまりガイド部１５のうちエッジ部１３に位置する部分を出入ガイド１５ｋという。 As shown in FIGS. 1 to 4, the syringe portion 10 has a notch-shaped guide portion 15 that guides the connecting portion 40 in the extending direction. In the syringe portion 10, the wall top portion 12t and the guide portion 15 are arranged along the extending direction. Note that in FIG. 4, the connecting portion 40 that is not actually visible is indicated by a dashed line. The guide portion 15 is a slit-like opening formed in a rectangular shape in a plan view, and has an open rear end so that the connecting portion 40 can be inserted from the rear portion of the syringe portion 10 . Each side surface 15s of the guide portion 15 is parallel to the extending direction. The guide portion 15 stably moves the connecting portion 40 along the extending direction. Hereinafter, the rear end of the guide portion 15, that is, the portion of the guide portion 15 positioned at the edge portion 13 will be referred to as an in/out guide 15k.

ガイド部１５の横幅Ｗは、連結部４０の横幅Ｖよりも若干長くなっている。横幅Ｗと横幅Ｖとの差は、連結部４０のガイド部１５内での摺動性を損なわない範囲で極力小さくするとよい。連結部４０の縦幅Ｄは、側壁部１２ａの厚みＴよりも若干長くなっている。連結部４０の縦幅Ｄは、連結部４０の、軸部３０側の端部から操作部５０側の端部までの距離に相当する。よって、軸部３０の上端と操作部５０の裏面５ｆとの間の距離、つまり軸部３０と操作部５０との間の間隙Ｋの長さｄは、側壁部１２ａの厚みＴよりも若干長くなる。したがって、ユーザがシリンジ部１０の後端から一体押子２０を挿入すると、側壁部１２ａの壁頂部１２ｔが一体押子２０の間隙Ｋに円滑に侵入する。すなわち、一体押子２０は、左右方向の動きがガイド部１５により制限され、上下方向の動きが軸部３０（ガスケット８０）と操作部５０とにより制限される。そのため、ユーザは、シリンジ部１０と組み合わせた一体押子２０を安定的にスライドさせることができる。 The width W of the guide portion 15 is slightly longer than the width V of the connecting portion 40 . The difference between the width W and the width V should be minimized as long as the slidability of the connecting portion 40 within the guide portion 15 is not impaired. The vertical width D of the connecting portion 40 is slightly longer than the thickness T of the side wall portion 12a. The vertical width D of the connection portion 40 corresponds to the distance from the end portion of the connection portion 40 on the shaft portion 30 side to the end portion on the operation portion 50 side. Therefore, the distance between the upper end of the shaft portion 30 and the rear surface 5f of the operation portion 50, that is, the length d of the gap K between the shaft portion 30 and the operation portion 50 is slightly longer than the thickness T of the side wall portion 12a. Become. Therefore, when the user inserts the integrated presser 20 from the rear end of the syringe portion 10, the wall top portion 12t of the side wall portion 12a smoothly enters the gap K of the integrated presser 20. As shown in FIG. That is, the integrated pusher 20 is restricted in horizontal movement by the guide portion 15 and is restricted in vertical movement by the shaft portion 30 (gasket 80 ) and the operating portion 50 . Therefore, the user can stably slide the integral pusher 20 combined with the syringe portion 10 .

外筒部１２の長さＸ、壁頂部１２ｔの長さＬ、及びガイド部１５の長さＧは、投与したい薬液の量、吸引したい液量、ユーザの指のストローク等をもとに決めるとよい。特にガイド部１５の長さＧは、連結部４０の可動範囲、つまりガスケット８０の可動範囲に直結する。各図のガイド部１５は、外筒部１２の中程の位置からエッジ部１３に亘って形成されている。ガイド部１５の長さＧは、連結部４０の必要十分な可動範囲が確保されていれば、あとは操作性等の観点から決めるとよい。壁頂部１２ｔの長さＬは、先端部１２ｂの内面からガイド部１５の先端１５ａまでの距離である。 The length X of the outer cylindrical portion 12, the length L of the wall top portion 12t, and the length G of the guide portion 15 are determined based on the amount of liquid medicine to be administered, the amount of liquid to be aspirated, the user's finger stroke, and the like. good. In particular, the length G of the guide portion 15 is directly linked to the movable range of the connecting portion 40 , that is, the movable range of the gasket 80 . The guide portion 15 in each figure is formed from the middle position of the outer cylinder portion 12 to the edge portion 13 . The length G of the guide portion 15 may be determined from the viewpoint of operability and the like as long as the necessary and sufficient movable range of the connecting portion 40 is ensured. The length L of the wall top portion 12 t is the distance from the inner surface of the tip portion 12 b to the tip 15 a of the guide portion 15 .

注射器１００は、壁頂部１２ｔの長さＬが、ガスケット８０の先端から連結部４０の先端までの長さＱよりも若干短くなるようにするとよい。そうすれば、一体押子２０を前方にスライドさせたとき、ガスケット８０が先端部１２ｂ内面に確実に接触するため、筒本体１１内の液体等を出しきることができる。もっとも、製造上可能であれば、注射器１００は、長さＬと長さＱとが等しくなるようにしてもよい。連結部４０の長さＰは、軸部３０及び操作部５０との固定強度、及びガイド部１５内での連結部４０の安定摺動性等を考慮して設定される。連結部４０の長さＰは、軸部３０及び操作部５０との固定強度確保の観点から、軸部３０の長さの１／８以上にするとよく、連結部４０の可動範囲確保の観点から、軸部３０の長さの１／２以下にするとよく、１／３以下がより好ましい。操作部５０の長さＮは、ユーザによる操作容易性、及び一体押子２０の安定摺動性等を考慮して設定される。 In the syringe 100, the length L of the wall top portion 12t is preferably slightly shorter than the length Q from the tip of the gasket 80 to the tip of the connecting portion 40. As shown in FIG. By doing so, when the integrated pusher 20 is slid forward, the gasket 80 reliably comes into contact with the inner surface of the tip portion 12b. However, syringe 100 may have length L equal to length Q if manufacturing permits. The length P of the connecting portion 40 is set in consideration of the fixing strength between the shaft portion 30 and the operating portion 50, the stable slidability of the connecting portion 40 within the guide portion 15, and the like. The length P of the connecting portion 40 is preferably ⅛ or more of the length of the shaft portion 30 from the viewpoint of ensuring the fixing strength between the shaft portion 30 and the operating portion 50, and from the viewpoint of ensuring the movable range of the connecting portion 40. , preferably 1/2 or less of the length of the shaft portion 30, and more preferably 1/3 or less. The length N of the operating portion 50 is set in consideration of ease of operation by the user, stable slidability of the integral pusher 20, and the like.

次に、図５及び図６に基づき、エッジ部１３の形状及びこれに関連する部材について説明する。エッジ部１３は、一体押子２０がシリンジ部１０に出し入れされる際、連結部４０の出入口となる挿入ゲート１３ｇを有している。挿入ゲート１３ｇは、出入ガイド１５ｋを挟んで配置された一対のゲート部３ｇを有している。ガイド部１５の各側面１５ｓは、ゲート部３ｇの箇所の上下方向の長さＴｓの方が、側壁部１２ａの箇所の上下方向の長さ（厚みＴに対応）よりも長くなっている。長さＴｓは、出入ガイド１５ｋの上下方向の長さに相当し、以降、出入ガイド１５ｋの縦幅Ｔｓともいう。 Next, based on FIGS. 5 and 6, the shape of the edge portion 13 and members related thereto will be described. The edge portion 13 has an insertion gate 13g that serves as an entrance and exit for the connecting portion 40 when the integrated plunger 20 is inserted into and removed from the syringe portion 10 . The insertion gate 13g has a pair of gate portions 3g arranged with an in-and-out guide 15k interposed therebetween. In each side surface 15s of the guide portion 15, the vertical length Ts at the gate portion 3g is longer than the vertical length (corresponding to the thickness T) at the side wall portion 12a. The length Ts corresponds to the vertical length of the entrance/exit guide 15k, and is hereinafter also referred to as the vertical width Ts of the entrance/exit guide 15k.

出入ガイド１５ｋの縦幅Ｔｓは、連結部４０の縦幅Ｄよりも設定長だけ長くなっている（図５参照）。つまり、厚みＴ、縦幅Ｄ、縦幅Ｔｓは、この順で長くなっている（Ｔ＜Ｄ＜Ｔｓ）。設定長は、出入ガイド１５ｋの縦幅Ｔｓと連結部４０の縦幅Ｄとの差分である。設定長は、ユーザが一体押子２０における連結部４０の箇所をシリンジ部１０に挿入する際、一定程度の力を要し、かつ一度通過した連結部４０の後退がエッジ部１３で妨げられるよう設定される。例えば、シリンジ部１０の内径が５ｍｍ程度で、外径が７ｍｍ程度の場合、設定長は、０．１ｍｍ～０．７ｍｍ程度にするとよく、０．２ｍｍ～０．５ｍｍ程度にするとより好ましい。設定長は、注射器１００の各構成部材のサイズに合わせて適宜変更するとよい。 The vertical width Ts of the in/out guide 15k is longer than the vertical width D of the connecting portion 40 by a set length (see FIG. 5). That is, the thickness T, the vertical width D, and the vertical width Ts are increased in this order (T<D<Ts). The set length is the difference between the vertical width Ts of the entrance/exit guide 15k and the vertical width D of the connecting portion 40. As shown in FIG. The set length is set so that a certain amount of force is required when the user inserts the connection portion 40 of the integrated pusher 20 into the syringe portion 10, and the edge portion 13 prevents the withdrawal of the connection portion 40 once passed. set. For example, when the inner diameter of the syringe portion 10 is about 5 mm and the outer diameter is about 7 mm, the set length is preferably about 0.1 mm to 0.7 mm, more preferably about 0.2 mm to 0.5 mm. The set length may be appropriately changed according to the size of each component of the syringe 100 .

ユーザは、シリンジ部１０に一体押子２０を装着する際、まずシリンジ部１０の後端に一体押子２０を配置し、出入穴３ｈからガスケット８０付きの軸部３０を挿入し、ガスケット８０及び軸部３０を軸穴１ｈに挿入する（図６の破線矢印（１）参照）。そして、連結部４０の前端面４ａがエッジ部１３に当たると、ユーザは、縦幅Ｔｓの方が縦幅Ｄよりも長いため、押す力を一定程度強めて連結部４０及びその近傍を挿入ゲート１３ｇに通過させる。その際、一体押子２０は、図５の白抜き矢印の方向に持ち上がり、ゲート部３ｇ下端の角が軸部３０の側面に当たった状態で、連結部４０の全域がエッジ部１３を超えるまでシリンジ部１０に圧入される（図６の破線矢印（２）参照）。なお、ゲート部３ｇ下端の角には丸みを持たせてもよい。ユーザは、連結部４０の全域がエッジ部１３を超えると、一体押子２０を所望の位置まで移動させる（図６の破線矢印（３）参照）。 When the user attaches the integrated pusher 20 to the syringe portion 10, the user first places the integrated pusher 20 at the rear end of the syringe portion 10, inserts the shaft portion 30 with the gasket 80 through the inlet/outlet hole 3h, and inserts the gasket 80 and The shaft portion 30 is inserted into the shaft hole 1h (see dashed arrow (1) in FIG. 6). Then, when the front end surface 4a of the connecting portion 40 hits the edge portion 13, the user increases the pressing force to a certain degree to push the connecting portion 40 and its vicinity into the insertion gate 13g because the vertical width Ts is longer than the vertical width D. pass through. At this time, the integrated pusher 20 is lifted in the direction of the white arrow in FIG. It is press-fitted into the syringe portion 10 (see the dashed arrow (2) in FIG. 6). The lower corners of the gate portion 3g may be rounded. When the entire area of the connecting portion 40 exceeds the edge portion 13, the user moves the integral pusher 20 to a desired position (see the dashed arrow (3) in FIG. 6).

挿入ゲート１３ｇの各ゲート部３ｇはそれぞれ、上部に、上面が平らな平坦部３ｍと、平坦部３ｍから立ち上がる段状の段部３ｎと、を有している。平坦部３ｍは、シリンジ部１０に一体押子２０を出し入れする際、操作部５０の裏面５ｆを沿わせる部分である。段部３ｎは、平坦部３ｍの外側に位置し、シリンジ部１０に一体押子２０を出し入れする際、操作部５０の出入りを側方から支持する。一方の段部３ｎの立上り箇所から他方の段部３ｎの立上り箇所までの距離は、操作部５０の横幅Ｍと概ね等しくなっている。各図では丸みを帯びた段部３ｎを例示している。もっとも、エッジ部１３の形状は、各図の例に限らず、種々の形状を採ることができる。挿入ゲート１３ｇの各ゲート部３ｇは段部３ｎを有しなくてもよく、この場合、平坦部３ｍの左右方向の長さは特に限定されない。 Each gate portion 3g of the insertion gate 13g has, at its upper portion, a flat portion 3m with a flat upper surface and a stepped portion 3n rising from the flat portion 3m. The flat portion 3m is a portion along which the back surface 5f of the operation portion 50 is placed when the integrated pusher 20 is put in and taken out of the syringe portion 10 . The stepped portion 3n is located outside the flat portion 3m, and supports the operation portion 50 from the side when the integrated pusher 20 is inserted into or removed from the syringe portion 10. As shown in FIG. The distance from the rising portion of one stepped portion 3n to the rising portion of the other stepped portion 3n is substantially equal to the lateral width M of the operating portion 50. As shown in FIG. Each figure illustrates a rounded stepped portion 3n. However, the shape of the edge portion 13 is not limited to the examples in each drawing, and various shapes can be adopted. Each gate portion 3g of the insertion gate 13g may not have the step portion 3n, and in this case, the length of the flat portion 3m in the horizontal direction is not particularly limited.

続いて、図７及び図８に基づき、注射器１００の取扱い方法の一例について説明する。筒先部１４には注射針が取り付けられているものとする。ユーザが、シリンジ部１０の後端に一体押子２０を配置し、出入穴３ｈからシリンジ部１０の内部にガスケット８０付きの軸部３０を挿入して前方に移動させた後、出入ガイド１５ｋから連結部４０を挿入することにより注射器１００が使用可能な状態となる。 Next, an example of a method for handling the syringe 100 will be described with reference to FIGS. 7 and 8. FIG. It is assumed that an injection needle is attached to the tube tip portion 14 . After the user places the integral pusher 20 at the rear end of the syringe portion 10, inserts the shaft portion 30 with the gasket 80 into the inside of the syringe portion 10 from the insertion/removal hole 3h, and moves it forward, it is pushed forward from the insertion/removal guide 15k. By inserting the connector 40, the syringe 100 is ready for use.

先端部１２ｂとガスケット８０との間の領域Ｓは、一体押子２０の後端面とエッジ部１３の前端面とが面一の状態で実質最大となる。ただし、注射器１００は、図７のように、一体押子２０とエッジ部１３との間の距離Ｒがある程度確保された状態で余力を持って使用するとよい。また、注射器１００は、領域Ｓの密閉性が確保された状態で使用される。すなわち、注射器１００は、ガスケット８０がガイド部１５の先端１５ａよりも前方に位置している範囲内で使用される。図７のように、所望の容量分の領域Ｓと距離Ｒとが確保された状態を引込状態という。 A region S between the tip portion 12b and the gasket 80 is substantially maximized when the rear end surface of the integrated pusher 20 and the front end surface of the edge portion 13 are flush with each other. However, as shown in FIG. 7, it is preferable to use the syringe 100 with a certain amount of extra force in a state in which the distance R between the integrated pusher 20 and the edge portion 13 is secured. Moreover, the syringe 100 is used in a state in which the sealing property of the region S is ensured. That is, the syringe 100 is used within a range in which the gasket 80 is located forward of the tip 15a of the guide portion 15. As shown in FIG. As shown in FIG. 7, the state in which the region S and the distance R for the desired capacity are secured is called the retracted state.

液体又は気体を吸引する場合、ユーザは、図８のような押出状態の注射器１００を用いる。図８には、ガスケット８０が筒本体１１の先端部に接触し、連結部４０がガイド部１５の先端１５ａ近傍に位置する状態を示している。例えば薬液等を吸引する場合、ユーザは、注射器１００のシリンジ部１０を握り、バイアルやアンプルなどに注射針の針先を挿入した後、指先等で操作部５０を後方にスライドさせる。これにより、薬液等が領域Ｓ（図７参照）に吸引される。採血や体液採取等の場合も同様、ユーザは、人体等に注射針の針先を刺し、指先等で操作部５０を後方にスライドさせて、血液等を領域Ｓに吸引する。 When aspirating a liquid or gas, the user uses the syringe 100 in the pushed state as shown in FIG. FIG. 8 shows a state in which the gasket 80 is in contact with the tip of the cylinder body 11 and the connecting portion 40 is positioned near the tip 15 a of the guide portion 15 . For example, when aspirating a liquid medicine or the like, the user grips the syringe portion 10 of the syringe 100, inserts the tip of the injection needle into a vial or ampoule, and then slides the operation portion 50 backward with a fingertip or the like. As a result, the chemical liquid or the like is sucked into the region S (see FIG. 7). Similarly, when collecting blood or body fluid, the user pierces the human body or the like with the needle tip of the injection needle, slides the operation unit 50 backward with the fingertip or the like, and sucks the blood or the like into the region S.

一方、液体又は気体を吐出する場合、ユーザは、図７のような引込状態の注射器１００を用いる。領域Ｓには、事前に吸引され又は充填された液体等が入っている。例えば薬液やワクチン等を注射する場合、ユーザは、注射器１００のシリンジ部１０を握り、人体等に注射針の針先を刺し、指先等で操作部５０を操作して一体押子２０を前方にスライドさせ、薬液等を注射針から吐出させる。 On the other hand, when ejecting liquid or gas, the user uses the syringe 100 in the retracted state as shown in FIG. Region S contains liquid or the like that has been aspirated or filled in advance. For example, when injecting a drug solution or a vaccine, the user grips the syringe portion 10 of the syringe 100, pierces the human body with the needle tip of the injection needle, and operates the operation portion 50 with a fingertip or the like to move the integrated pusher 20 forward. By sliding, the liquid medicine or the like is discharged from the injection needle.

このように、連結部４０がガイド部１５に入ると、連結部４０の両側面が、対向するガイド部１５の各側面１５ｓによって挟まれ、左右方向の移動が制限される。よって、ユーザは、操作部５０の操作面５ｇに指を当て、操作部５０を前後にスライドさせることで、ガスケット８０をスムーズに移動させ、液体や気体の吸引又は吐出を行うことができる。さらに、一体押子２０の摺動時には、壁頂部１２ｔが軸部３０と操作部５０とで挟まれるため、操作上の安定性及び信頼性が高まる。 In this manner, when the connecting portion 40 enters the guide portion 15, both side surfaces of the connecting portion 40 are sandwiched by the opposing side surfaces 15s of the guide portion 15, and lateral movement is restricted. Therefore, by putting a finger on the operation surface 5g of the operation unit 50 and sliding the operation unit 50 back and forth, the user can smoothly move the gasket 80 and suck or discharge liquid or gas. Furthermore, when the integrated pusher 20 slides, the wall top portion 12t is sandwiched between the shaft portion 30 and the operation portion 50, so that operational stability and reliability are enhanced.

次に図９及び図１０を参照し、一体押子２０の製造に用いる金型、及び一体押子２０の製造方法の一例について説明する。一体押子２０は、３Ｄプリンタ等を用いて形成してもよいが、量産する場合は射出成形が好適である。図９には、射出成形機（不図示）で用いる一対の金型６０を例示している。一対の金型６０は、一体押子２０を平面視での延伸方向に沿った断面で対称に分けたときの、一方の部材に対応する第１金型６１と、他方の部材に対応する第２金型６２と、により構成されている。 Next, with reference to FIGS. 9 and 10, an example of a mold used for manufacturing the integrated pusher 20 and a manufacturing method of the integrated pusher 20 will be described. The integrated pusher 20 may be formed using a 3D printer or the like, but injection molding is suitable for mass production. FIG. 9 illustrates a pair of molds 60 used in an injection molding machine (not shown). The pair of molds 60 is composed of a first mold 61 corresponding to one member and a second mold 61 corresponding to the other member when the integrated pusher 20 is divided symmetrically in a cross section along the extending direction in plan view. 2 molds 62 .

第１金型６１は、一体押子２０を左右対称に分けたときの、左側の部材の外形に合わせた型面６１ｆを有している。第２金型６２は、一体押子２０を左右対称に分けたときの、右側の部材の外形に合わせた型面６２ｆを有している。図９では、実際には外から視認できない型面６１ｆ及び型面６２ｆを破線で示している。一対の金型６０は、第１金型６１の型面６１ｆと、第２金型６２の型面６２ｆとを対向させ、第１金型６１と第２金型６２とを合わせ密封して用いる。射出成形機において、第１金型６１と第２金型６２とは、何れか一方が固定側、他方が可動側となる。 The first mold 61 has a mold surface 61f that conforms to the outer shape of the left member when the integrated pusher 20 is divided symmetrically. The second mold 62 has a mold surface 62f that conforms to the outer shape of the right member when the integrated presser 20 is divided symmetrically. In FIG. 9, the mold surfaces 61f and 62f, which are actually invisible from the outside, are indicated by broken lines. The pair of molds 60 is used by facing the mold surface 61f of the first mold 61 and the mold surface 62f of the second mold 62, and sealing the first mold 61 and the second mold 62 together. . In the injection molding machine, one of the first mold 61 and the second mold 62 is fixed and the other is movable.

一対の金型６０は、成形品の取出しが容易となるよう、抜き勾配等が考慮されて設計されている。本実施の形態１の一体押子２０は、一対の金型６０からの抜け易さを考慮し、操作部５０の裏面５ｆが平坦となっており、各凸部５１ｐは、左右方向に沿って延びている。一体押子２０の全体が丸みを帯びていることや、連結部４０の前端面４ａが外側に湾曲していることも、一体押子２０の一対の金型６０からの外し易さに繋がっている。 The pair of molds 60 are designed in consideration of the draft angle and the like so that the molded product can be easily removed. In consideration of ease of removal from the pair of molds 60, the integral pusher 20 of the first embodiment has a flat rear surface 5f of the operation portion 50, and each convex portion 51p extends in the left-right direction. extended. The fact that the entire pusher 20 is rounded and the front end face 4a of the connecting portion 40 is curved outward also contributes to the ease of removing the pusher 20 from the pair of molds 60. there is

続いて図１０のフローチャートに基づき、一体押子２０の製造方法に係る各工程について説明する。まず射出成形機は、第１金型６１と第２金型６２とを合わせて閉じる。そして射出成型機は、閉じた一対の金型６０を両サイド（左右）から圧力をかけて締め付ける。このとき、一対の金型６０の内側には、第１金型６１の型面６１ｆと第２金型６２の型面６２ｆとにより、一体押子２０同様の外形の空洞が形成される（ステップＳ１０１：型締め工程）。 Next, each process related to the manufacturing method of the integrated pusher 20 will be described based on the flow chart of FIG. 10 . First, the injection molding machine closes the first mold 61 and the second mold 62 together. The injection molding machine clamps the closed pair of molds 60 by applying pressure from both sides (right and left). At this time, inside the pair of molds 60, a cavity having an external shape similar to that of the integrated presser 20 is formed by the mold surface 61f of the first mold 61 and the mold surface 62f of the second mold 62 (step S101: mold clamping step).

次いで射出成形機は、第１金型６１と第２金型６２とにより形成される空洞に、加熱され溶融された樹脂を注入する（ステップＳ１０２：樹脂注入工程）。次に射出成形機は、一対の金型６０に両サイドから一定の圧力をかけたまま、一対の金型６０を冷却し、内部の樹脂を固化する（ステップＳ１０３：固化工程）。続いて射出成形機は、一対の金型６０を開く。つまり射出成形機は、第１金型６１及び第２金型６２のうちの可動側の金型を動かし、第１金型６１と第２金型６２とを分離する。これにより一体押子２０は、可動側の金型に残る（ステップＳ１０４：型開き工程）。そして、射出成形機又はユーザは、可動側の金型から一体押子２０を取り出す（ステップＳ１０５：取出し工程）。 Next, the injection molding machine injects heated and melted resin into the cavity formed by the first mold 61 and the second mold 62 (step S102: resin injection step). Next, the injection molding machine cools the pair of molds 60 while applying constant pressure to the pair of molds 60 from both sides to solidify the resin inside (step S103: solidification step). The injection molding machine then opens a pair of molds 60 . That is, the injection molding machine separates the first mold 61 and the second mold 62 by moving the mold on the movable side out of the first mold 61 and the second mold 62 . As a result, the integral pusher 20 remains in the mold on the movable side (step S104: mold opening step). Then, the injection molding machine or the user takes out the integrated pusher 20 from the mold on the movable side (step S105: take-out step).

注射器１００の製造方法は、一体押子２０の製造に係る上記各工程の他、シリンジ部１０の製造に係る各工程と、一体押子２０にガスケット８０を取り付ける工程と、シリンジ部１０に一体押子２０を組み込む工程と、を含む。シリンジ部１０は、３Ｄプリンタ等を用いて形成してもよいが、量産する場合は、一体押子２０と同様、射出成形により形成するとよい。 The manufacturing method of the syringe 100 includes, in addition to the above-described steps related to the manufacturing of the integrated plunger 20, each step related to the manufacturing of the syringe portion 10, the step of attaching the gasket 80 to the integrated pusher 20, and the step of attaching the gasket 80 to the syringe portion 10. and assembling child 20 . The syringe part 10 may be formed using a 3D printer or the like, but in the case of mass production, it is preferable to form it by injection molding, as with the integrated pusher 20 .

以上のように、本実施の形態１の注射器１００は、筒状のシリンジ部１０と、軸部３０と連結部４０と操作部５０とが一体成形された一体押子２０と、を有している。シリンジ部１０は、連結部４０を延伸方向に案内する切欠き状のガイド部１５を有している。よって、ユーザは、操作部５０を指先等でスライドさせることにより、軸部３０に取り付けられたガスケット８０を延伸方向に移動させ、液体の吸引又は吐出を行うことができるため、注射に係る作業の効率化が実現可能となる。すなわち、対象に針を刺してから体液等を吸引するまで、又は薬液等を投与するまで、更には薬液等を吸引し対象に針を刺してから薬液等を投与するまでの一連の作業時間が短縮され、作業効率の向上を図ることができる。特に、注射に係る作業を繰り返し行う場合は、大幅に時間を短縮できる。操作部５０は、従来の注射器のプランジャよりも針先に近いシリンジ部１０に対向配置され、操作時の持ち替えも要しないため、吸引時又は吐出時の針先のぶれを抑制することができ、被注射者の負担を軽減することができる。 As described above, the syringe 100 of Embodiment 1 has the cylindrical syringe portion 10 and the integrated pusher 20 in which the shaft portion 30, the connecting portion 40, and the operating portion 50 are integrally formed. there is The syringe portion 10 has a notch-shaped guide portion 15 that guides the connecting portion 40 in the extending direction. Therefore, the user can move the gasket 80 attached to the shaft portion 30 in the extension direction by sliding the operation portion 50 with a fingertip or the like, thereby aspirating or discharging the liquid. Efficiency can be realized. In other words, a series of work times from injecting a needle into a subject to aspirating the body fluid, etc., or administering the liquid medicine, etc., and further, from aspirating the liquid medicine, etc., pricking the subject with a needle, and administering the liquid medicine, etc. It is shortened, and work efficiency can be improved. In particular, when the work related to injection is repeated, the time can be greatly shortened. The operation part 50 is arranged to face the syringe part 10, which is closer to the needle tip than the plunger of a conventional syringe, and does not require a change of grip during operation. The burden on the injection recipient can be reduced.

また、軸部３０は、棒状のものであり、操作部５０は、平面視で延伸方向を長辺とする長方形状である。そして、連結部４０は、軸部３０及び操作部５０それぞれの、シリンジ部１０におけるガイド部１５側の部分に接続されている。つまり、連結部４０は、軸部３０の後部及び操作部５０の後部に接続されている。したがって、ガスケット８０が壁頂部１２ｔの下部に位置する状態での一体押子２０の可動範囲が確保され、液体や気体の吸引又は吐出を好適に行うことができる。操作部５０の形状について、平面視長方形状には、断面視矩形状、断面視円形状、断面視楕円形状等の他、両サイドに多少の湾曲が施されたもの、角に丸みを帯びたものも等も含まれる。 Further, the shaft portion 30 is rod-shaped, and the operation portion 50 is rectangular in plan view with the long side extending in the extending direction. The connecting portion 40 is connected to the portion of the syringe portion 10 on the guide portion 15 side of each of the shaft portion 30 and the operating portion 50 . That is, the connecting portion 40 is connected to the rear portion of the shaft portion 30 and the rear portion of the operating portion 50 . Therefore, the movable range of the integrated pusher 20 is ensured while the gasket 80 is positioned below the wall top portion 12t, and liquid or gas can be preferably sucked or discharged. Regarding the shape of the operation unit 50, the rectangular shape in plan view includes a rectangular shape in cross section, a circular shape in cross section, an elliptical shape in cross section, a shape with both sides slightly curved, and a shape with rounded corners. This includes things, etc.

一体押子２０は、軸部３０と連結部４０と操作部５０との延伸方向における後端の位置を揃えると、取扱い上の利便性が高まり、一対の金型６０からの抜け易さが向上する。もっとも、一体押子２０は、連結部４０の後端が、軸部３０及び操作部５０の後端よりも内側に入った形状を採ってもよい。一体押子２０は、延伸方向の位置について、操作部５０の先端部分と軸部３０の先端部分とが重なるように構成してもよい。すなわち、一体押子２０は、平面視において、操作部５０の先端部分と軸部３０の先端部分とが重なるようにしてもよい。そうすれば、液体等の押出し又は吸引に直接作用するガスケット８０に、操作時の力点となる操作部５０が近づくため、スライド操作に必要な力を軽減することができ、手振れ等を更に抑制することができる。加えて、壁頂部１２ｔを挟持する間隙Ｋの長さを確保できるため、一体押子２０のスライド動作の安定性を高めることができる。各図のように、平面視において、操作部５０の先端がガスケット８０と重なるようにすれば、特に吐出時の操作安定性を高めることができる。 By aligning the rear ends of the shaft portion 30, the connecting portion 40, and the operation portion 50 in the extending direction, the integrated pusher 20 is more convenient to handle and easier to remove from the pair of molds 60. do. However, the integrated pusher 20 may have a shape in which the rear end of the connecting portion 40 is inside the rear ends of the shaft portion 30 and the operating portion 50 . The integrated pusher 20 may be configured such that the distal end portion of the operating portion 50 and the distal end portion of the shaft portion 30 overlap each other in the extension direction. That is, the integrated pusher 20 may be configured such that the tip portion of the operating portion 50 and the tip portion of the shaft portion 30 overlap in plan view. By doing so, the operating portion 50, which is the point of force during operation, approaches the gasket 80 that directly acts on pushing out or sucking the liquid, etc., so that the force required for the slide operation can be reduced, and camera shake and the like can be further suppressed. be able to. In addition, since the length of the gap K for sandwiching the wall top portion 12t can be secured, the stability of the sliding operation of the integrated presser 20 can be enhanced. As shown in each figure, if the tip of the operation portion 50 overlaps with the gasket 80 in plan view, it is possible to enhance the operation stability especially during ejection.

操作部５０は、連結部４０に接続された支持部５２と、支持部５２から延伸方向に沿って前方に延びる主部５１とを有している。すなわち、ユーザが主に操作する主部５１が針先側に近いため、操作の安定性を高めることができる。また、主部５１は、延伸方向における中央に向けて徐々に高さが低くなっている。そのため、ユーザは自然に、吐出時には主部５１前方に力を加え、吸引時には主部５１後方に力を加えることになり、効率よく操作部５０に力を加えることができるため、より軽い力で安定的に一体押子２０のスライド操作を行うことができる。なお、主部５１は、操作面５ｇが平坦な直方体状のものであってよい。操作部５０は、支持部５２を設けず、主部５１だけで構成してもよい。この場合、一体押子２０は、操作部５０としての主部５１の後部に連結部４０が接続された形状となる。かかる構成において、操作部５０は、操作面５ｇが平坦な直方体状にしてもよいが、延伸方向における中央に向けて徐々に高さが低くなるようにしてもよい。 The operation portion 50 has a support portion 52 connected to the connecting portion 40 and a main portion 51 extending forward from the support portion 52 along the extending direction. That is, since the main portion 51 that is mainly operated by the user is close to the needle tip side, the stability of the operation can be enhanced. Moreover, the height of the main portion 51 gradually decreases toward the center in the extending direction. Therefore, the user naturally applies force to the front of the main portion 51 when ejecting, and applies force to the rear of the main portion 51 when sucking. The slide operation of the integral pusher 20 can be stably performed. The main portion 51 may have a rectangular parallelepiped shape with a flat operation surface 5g. The operation portion 50 may be configured only by the main portion 51 without providing the support portion 52 . In this case, the integrated pusher 20 has a shape in which the connecting portion 40 is connected to the rear portion of the main portion 51 as the operation portion 50 . In such a configuration, the operation portion 50 may have a rectangular parallelepiped shape with a flat operation surface 5g, or may have a height that gradually decreases toward the center in the extending direction.

本実施の形態１の注射器１００は、出入ガイド１５ｋの縦幅Ｔｓが、連結部４０の縦幅Ｄよりも設定長だけ長くなっている。よって、一度入れた一体押子２０がシリンジ部１０から抜けにくくなるため、使用時におけるユーザの安心感を高めることができる。なお、シリンジ部１０は、エッジ部１３を設けずに構成してもよいが、強度確保や操作性向上等の観点からエッジ部１３を設けた方がよい。 In syringe 100 of Embodiment 1, vertical width Ts of in-and-out guide 15k is longer than vertical width D of connecting portion 40 by a set length. As a result, the integral pusher 20, which has been inserted once, is less likely to come off from the syringe portion 10, thereby enhancing the user's sense of security during use. The syringe part 10 may be configured without the edge part 13, but it is better to provide the edge part 13 from the viewpoint of securing strength and improving operability.

実施の形態２．
図１１を参照し、本発明の実施の形態２に係る注射器について説明する。本実施の形態２の注射器は、ガスケット８０が不要な構成を採っているが、基本的な構成は実施の形態１の注射器と同様であるため、符号「１００」を付し、実施の形態１と同等の構成部材には同一の符号を用いて説明は省略又は簡略化する。 Embodiment 2.
A syringe according to Embodiment 2 of the present invention will be described with reference to FIG. The syringe of the second embodiment adopts a configuration that does not require the gasket 80, but the basic configuration is the same as that of the syringe of the first embodiment. The same reference numerals are used for constituent members equivalent to , and descriptions thereof are omitted or simplified.

すなわち、実施の形態２の注射器１００は、筒状のシリンジ部１０と、シリンジ部１０と組み合わせて用いられる一体押子１２０と、を有している。一体押子１２０は、シリンジ部１０の内部に配置される棒状の軸部１３０と、シリンジ部１０の外部に配置される操作部５０と、軸部１３０と操作部５０とをつなぐ連結部４０とが一体成形されたものである。連結部４０は、軸部１３０及び操作部５０それぞれの後部に接続されている。 That is, the syringe 100 of Embodiment 2 has a cylindrical syringe portion 10 and an integral pusher 120 used in combination with the syringe portion 10 . The integral pusher 120 includes a rod-shaped shaft portion 130 arranged inside the syringe portion 10, an operating portion 50 arranged outside the syringe portion 10, and a connecting portion 40 connecting the shaft portion 130 and the operating portion 50. are integrally molded. The connecting portion 40 is connected to the rear portions of the shaft portion 130 and the operation portion 50 .

軸部１３０は、軸本体３１と前端部３５とを有している。前端部３５は、軸本体３１の前端面から延伸方向に沿って延びている。図１１に例示する前端部３５は、拡張部３ｐと接触部３ｓとを有している。拡張部３ｐは、軸本体３１に接続されており、軸本体３１側の面の半径よりも、接触部３ｓ側の面の半径の方が長い円錐台状となっている。接触部３ｓは、拡張部３ｐから円柱状に延びている。接触部３ｓの延伸方向の長さは、拡張部３ｐの延伸方向の長さよりも短くなっている。図１１の長さＱは、軸部１３０の先端から連結部４０の先端まで長さであり、長さＱと壁頂部１２ｔの長さＬとの関係は、実施の形態１と同様である。 The shaft portion 130 has a shaft body 31 and a front end portion 35 . The front end portion 35 extends from the front end surface of the shaft body 31 along the extending direction. The front end portion 35 illustrated in FIG. 11 has an extension portion 3p and a contact portion 3s. The extended portion 3p is connected to the shaft body 31 and has a truncated cone shape in which the radius of the surface on the side of the contact portion 3s is longer than the radius of the surface on the shaft body 31 side. The contact portion 3s extends cylindrically from the extended portion 3p. The length of the contact portion 3s in the extending direction is shorter than the length of the extending portion 3p in the extending direction. The length Q in FIG. 11 is the length from the tip of the shaft portion 130 to the tip of the connecting portion 40, and the relationship between the length Q and the length L of the wall top portion 12t is the same as in the first embodiment.

一体押子１２０は、シリンジ部１０に組み込んだとき、接触部３ｓの側面がシリンジ部１０の内面に接触する。すなわち、前端部３５は、実施の形態１のガスケット８０と同様に機能する。一体押子１２０の製造方法は、一体押子２０の製造方法と同様である。つまり一体押子１２０は、３Ｄプリンタ等を用いて形成してもよいが、量産する場合は一体押子２０と同様、第１金型６１と第２金型６２とを用いた射出成形により形成するとよい。シリンジ部１０に一体押子１２０を装着する手法は、図５及び図６をもとに説明した一体押子２０の装着手法と同様である。注射器１００の取扱い方法も、実施の形態１と同様である。 When the integral pusher 120 is incorporated in the syringe portion 10 , the side surface of the contact portion 3 s contacts the inner surface of the syringe portion 10 . That is, the front end portion 35 functions similarly to the gasket 80 of the first embodiment. The manufacturing method of the integrated pusher 120 is the same as the manufacturing method of the integrated pusher 20 . In other words, the integrated pusher 120 may be formed using a 3D printer or the like, but in the case of mass production, it is formed by injection molding using the first mold 61 and the second mold 62, like the integrated pusher 20. do it. The method of mounting the integrated pusher 120 on the syringe portion 10 is the same as the mounting method of the integrated pusher 20 described with reference to FIGS. The method of handling syringe 100 is also the same as in the first embodiment.

以上のように、本実施の形態２の注射器１００は、軸部１３０と連結部４０と操作部５０とが一体成形された一体押子１２０を有しており、シリンジ部１０は、連結部４０を延伸方向に案内する切欠き状のガイド部１５を有している。よって、ユーザは、操作部５０を指先等でスライドさせることにより、軸部３０を延伸方向に移動させ、液体の吸引又は吐出を行うことができるため、注射に係る作業の効率化が実現可能となる。すなわち、対象に針を刺してから体液等を吸引するまで、又は薬液等を投与するまで、更には薬液等を吸引し対象に針を刺してから薬液等を投与するまでの一連の作業時間が短縮され、作業効率の向上を図ることができる。特に、注射に係る作業を繰り返し行う場合は、大幅に時間を短縮できる。操作部５０は、従来の注射器のプランジャよりも針先に近いシリンジ部１０に対向配置され、操作時の持ち替えも要しないため、吸引時又は吐出時の針先のぶれを抑制することができ、被注射者の負担を軽減することができる。 As described above, the syringe 100 of Embodiment 2 has the integrated pusher 120 in which the shaft portion 130, the connecting portion 40, and the operating portion 50 are integrally formed. It has a notch-shaped guide portion 15 for guiding in the extending direction. Therefore, by sliding the operation part 50 with a fingertip or the like, the user can move the shaft part 30 in the extending direction to suck or discharge the liquid. Become. In other words, a series of work times from injecting a needle into a subject to aspirating the body fluid, etc., or administering the liquid medicine, etc., and further, from aspirating the liquid medicine, etc., pricking the subject with a needle, and administering the liquid medicine, etc. It is shortened, and work efficiency can be improved. In particular, when the work related to injection is repeated, the time can be greatly shortened. The operation part 50 is arranged to face the syringe part 10, which is closer to the needle tip than the plunger of a conventional syringe, and does not require a change of grip during operation. The burden on the injection recipient can be reduced.

また、注射器１００は、ガスケット８０が不要なため、部品点数を減らし、形状の簡素化を図ることができる。よって、一体押子１２０を射出成形する場合は、各金型それぞれの型面の形状を単純化できるため、一体押子１２０の金型からの取り外しが更に容易となる。ところで、微量の薬液等の吸引又は吐出用に、シリンジ部１０の管径を小さくすると、軸部３０も細くなるため、ガスケット８０の取付けが困難となる。加えて、シリンジ部１０内でのガスケット８０の移動が円滑にいかない可能性もある。この点、一体押子１２０は、ガスケット８０の代わりに前端部３５を有していることから、ガスケット８０の取付作業が不要となり、ガスケット８０の抜け等の心配もなくなるため、作業性及び利便性の向上を図ることができる。前端部３５は、各図のガスケット８０と同様の形状、全域に亘って円柱状、又は軸本体３１よりも細い円柱状もしくは円錐台状の拡張部３ｐと接触部３ｓとの組み合わせなど、種々の形状を採ってもよい。ただし、スライド操作の円滑性及び強度等の観点から、前端部３５は、先端に向けて徐々に広がる拡張部３ｐと円柱状の接触部３ｓとにより構成した方がよい。他の効果等は、実施の形態１と同様である。 Moreover, since the syringe 100 does not require the gasket 80, the number of parts can be reduced and the shape can be simplified. Therefore, when the integrated presser 120 is injection molded, the shape of the mold surface of each mold can be simplified, so that the integrated presser 120 can be more easily removed from the mold. By the way, if the tube diameter of the syringe part 10 is made small for sucking or discharging a very small amount of liquid medicine or the like, the shaft part 30 will also become thin, making it difficult to attach the gasket 80 . In addition, the movement of the gasket 80 within the syringe portion 10 may not be smooth. In this respect, since the integral pusher 120 has the front end portion 35 instead of the gasket 80, the operation of attaching the gasket 80 is not required, and there is no fear of the gasket 80 coming off, etc., thus improving workability and convenience. can be improved. The front end portion 35 may have a shape similar to that of the gasket 80 in each figure, a cylindrical shape over the entire area, or a combination of a cylindrical or truncated conical extension portion 3p narrower than the shaft body 31 and the contact portion 3s. You can take any shape. However, from the viewpoint of the smoothness and strength of the sliding operation, the front end portion 35 should be composed of the extended portion 3p gradually widening toward the tip and the cylindrical contact portion 3s. Other effects and the like are the same as those of the first embodiment.

上述した各実施の形態は、本発明に係る注射器及びその製造方法の一例であり、本発明の技術的範囲はこれらの態様に限定されない。例えば、シリンジ部１０は、必ずしも全体が透明又は半透明である必要はなく、部分的に透明性を有するようにしてもよく、全体が不透明であってもよい。シリンジ部１０は、側壁部１２ａの領域Ｓに対応する箇所に、内容量を示す目盛りを有していてもよい。ガイド部１５は、エッジ部１３の箇所の横幅Ｗが、外筒部１２の箇所の横幅Ｗよりも所定の長さ短くなるようにしてもよい。このようにしても、一度入れた一体押子２０又は一体押子１２０がシリンジ部１０から抜けにくくなる。注射器１００は、出入ガイド１５ｋの縦幅Ｔｓを連結部４０の縦幅Ｄよりも長くする構成と、ガイド部１５のエッジ部１３の箇所を相対的に狭くする構成との双方を有していてもよく、何れか一方だけを有していてもよい。軸部３０又は軸部１３０の長さと操作部５０の長さとの関係は、各図の例に限らず、適宜変更することができる。例えば、一体押子２０は、軸部３０の先端よりも操作部５０の先端の方が前方に位置していてもよい。一体押子１２０は、軸部１３０の先端よりも操作部５０の先端の方が前方に位置していてもよい。一体押子２０は、平面視において、操作部５０の先端がガスケット８０と重ならなくてもよい。一体押子１２０は、平面視において、操作部５０の先端が前端部３５と重ならなくてもよい。 Each embodiment mentioned above is an example of the syringe which concerns on this invention, and its manufacturing method, and the technical scope of this invention is not limited to these aspects. For example, the syringe part 10 does not necessarily have to be entirely transparent or translucent, and may be partially transparent or entirely opaque. The syringe part 10 may have a scale indicating the content capacity at a portion corresponding to the region S of the side wall part 12a. The width W of the guide portion 15 at the edge portion 13 may be shorter than the width W at the outer cylinder portion 12 by a predetermined length. Even in this way, the integrated pusher 20 or the integrated pusher 120 that has been inserted once is less likely to come off from the syringe portion 10 . The syringe 100 has both a configuration in which the vertical width Ts of the in-and-out guide 15k is longer than the vertical width D of the connecting portion 40, and a configuration in which the edge portion 13 of the guide portion 15 is relatively narrow. or only one or the other. The relationship between the length of the shaft portion 30 or the shaft portion 130 and the length of the operation portion 50 is not limited to the example shown in each drawing, and can be changed as appropriate. For example, the tip of the operating portion 50 of the integrated pusher 20 may be positioned forward of the tip of the shaft portion 30 . The integrated pusher 120 may be positioned forward of the tip of the operating portion 50 relative to the tip of the shaft portion 130 . The integrated presser 20 does not have to overlap the gasket 80 with the tip of the operating portion 50 in a plan view. In the integrated presser 120, the tip of the operation portion 50 does not have to overlap the front end portion 35 in plan view.

１ｈ 軸穴、３ｇ ゲート部、３ｈ 出入穴、３ｍ 平坦部、３ｎ 段部、３ｐ 拡張部、３ｓ 接触部、４ａ 前端面、５ｆ 裏面、５ｇ 操作面、１０ シリンジ部、１１ 筒本体、１２ 外筒部、１２ａ 側壁部、１２ｂ 先端部、１２ｔ 壁頂部、１３ エッジ部、１３ｇ 挿入ゲート、１４ 筒先部、１５ ガイド部、１５ａ 先端、１５ｋ 出入ガイド、１５ｓ 側面、２０ 一体押子、３０、１３０ 軸部、３１ 軸本体、３２ 先端突起、３５ 前端部、４０ 連結部、５０ 操作部、５１ 主部、５１ｐ 凸部、５２ 支持部、８０ ガスケット、１００ 注射器、Ｄ 縦幅、Ｅ、Ｔ 厚み、Ｋ 間隙、Ｍ、Ｖ、Ｗ 横幅、Ｒ 距離、Ｓ 領域、ｄ、Ｇ、Ｌ、Ｎ、Ｐ、Ｑ、Ｘ 長さ、Ｔｓ 縦幅（長さ）。

1h Shaft hole 3g Gate portion 3h Entrance/exit hole 3m Flat portion 3n Step portion 3p Expansion portion 3s Contact portion 4a Front end surface 5f Back surface 5g Operation surface 10 Syringe portion 11 Cylinder main body 12 Outer cylinder Part 12a Side wall part 12b Tip part 12t Wall top part 13 Edge part 13g Insertion gate 14 Tube tip part 15 Guide part 15a Tip part 15k In/out guide 15s Side face 20 Integrated presser 30, 130 Shaft part , 31 shaft body, 32 tip projection, 35 front end portion, 40 connection portion, 50 operation portion, 51 main portion, 51p convex portion, 52 support portion, 80 gasket, 100 syringe, D length width, E, T thickness, K gap , M, V, W width, R distance, S region, d, G, L, N, P, Q, X length, Ts height (length).

Claims (1)

筒状のシリンジ部と、
前記シリンジ部と組み合わせて用いられる一体押子と、を有し、
前記一体押子は、
前記シリンジ部の内部に配置される棒状の軸部と、前記シリンジ部の外部に配置される操作部と、前記軸部と前記操作部とをつなぐ連結部とが一体成形されたものであり、
前記シリンジ部は、
筒状に延伸する外筒部と、
前記外筒部の後端に接続された板状のエッジ部と、
前記連結部を前記シリンジ部の延伸方向に案内する切欠き状のガイド部と、を有し、
前記操作部は、平面視で前記延伸方向を長辺とする長方形状であり、
前記連結部は、
前記軸部及び前記操作部それぞれの、前記シリンジ部における前記ガイド部側の部分に接続されており、
前記ガイド部のうち、前記エッジ部に位置する部分である出入ガイドの縦幅は、前記連結部の縦幅よりも設定長だけ長くなっている、注射器。 a cylindrical syringe portion;
and an integrated presser used in combination with the syringe part,
The integral presser is
A rod-shaped shaft portion disposed inside the syringe portion, an operation portion disposed outside the syringe portion, and a connecting portion connecting the shaft portion and the operation portion are integrally molded,
The syringe part is
an outer cylindrical portion extending in a cylindrical shape;
a plate-shaped edge portion connected to the rear end of the outer cylindrical portion;
a notch-shaped guide portion that guides the connecting portion in the extending direction of the syringe portion;
The operation part has a rectangular shape with a long side extending in the extending direction in a plan view,
The connecting part is
each of the shaft portion and the operation portion is connected to a portion of the syringe portion on the guide portion side,
The syringe, wherein the vertical width of the entrance/exit guide, which is the portion of the guide portion located at the edge portion, is longer than the vertical width of the connecting portion by a set length.
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US20220023545A1 (en) 2017-02-15 2022-01-27 Board Of Regents Of The University Of Nebraska Precision syringe plunger with separately manufactured and irreversibly coupled plunger arm and plunger rod
JP2022032701A (en) 2020-08-13 2022-02-25 株式会社トップ Manufacturing method for needle-having syringe and needle-having syringe

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US20220023545A1 (en) 2017-02-15 2022-01-27 Board Of Regents Of The University Of Nebraska Precision syringe plunger with separately manufactured and irreversibly coupled plunger arm and plunger rod
CN209204319U (en) 2018-06-11 2019-08-06 侯晓琨 A kind of one-hand operation Anti-stabbing type enclosed syringe structure
CN211583379U (en) 2019-10-15 2020-09-29 杭州萧山微麦思外科门诊部有限公司 Glue-free vein cutter
JP2022032701A (en) 2020-08-13 2022-02-25 株式会社トップ Manufacturing method for needle-having syringe and needle-having syringe

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